The WTRCT8-890-990-0.2-1.2-40-1 from Wainwright Instruments is a Tunable Filter with Frequency 0.89 to 0.99 GHz, Tunable Frequency 100 MHz, Bandwidth 0.2 MHz, Rejection 40 dB, Insertion Loss 0.6 to 2.25 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT8-890-990-0.2-1.2-40-1 can be seen below.